package com.lanou.dllo.findfood.util;




import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.NinePatchDrawable;
import android.util.AttributeSet;
import android.widget.ImageView;

import com.lanou.dllo.findfood.R;


public class CircleImage extends ImageView{


	/**
	 * 圆形ImageView，可设置最多两个宽度不同且颜色不同的圆形边框。
	 * 设置颜色在xml布局文件中由自定义属性配置参数指定
	 */

	    private int mBorderThickness = 0;
	    private Context mContext;
	    private int defaultColor = 0xFFFFFFFF;
	    // 如果只有其中一个有值，则只画一个圆形边框
	    private int mBorderOutsideColor = 0;
	    private int mBorderInsideColor = 0;
	    // 控件默认长、宽
	    private int defaultWidth = 0;
	    private int defaultHeight = 0;

	    public CircleImage(Context context) {
	        super(context);
	        mContext = context;
	    }

	    public CircleImage(Context context, AttributeSet attrs) {
	        super(context, attrs);
	        mContext = context;
	        setCustomAttributes(attrs);
	    }

	    public CircleImage(Context context, AttributeSet attrs, int defStyle) {
	        super(context, attrs, defStyle);
	        mContext = context;
	        setCustomAttributes(attrs);
	    }

	    private void setCustomAttributes(AttributeSet attrs) {// R.styleable.CircleImage
	        TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.CircleImage);
	    }

	    @Override
	    protected void onDraw(Canvas canvas) {
	        Drawable drawable = getDrawable() ;
	        if (drawable == null) {
	            return;
	        }
	        if (getWidth() == 0 || getHeight() == 0) {
	            return;
	        }
	        this.measure(0, 0);
	        if (drawable.getClass() == NinePatchDrawable.class)
	            return;
	        Bitmap b = ((BitmapDrawable) drawable).getBitmap();
	        Bitmap bitmap = b.copy(Bitmap.Config.ARGB_8888, true);
	        if (defaultWidth == 0) {
	            defaultWidth = getWidth();
	        }
	        if (defaultHeight == 0) {
	            defaultHeight = getHeight();
	        }
	        int radius = 0;
	        if (mBorderInsideColor != defaultColor && mBorderOutsideColor != defaultColor) {// 定义画两个边框，分别为外圆边框和内圆边框
	            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - 2 * mBorderThickness;
	            // 画内圆
	            drawCircleBorder(canvas, radius + mBorderThickness / 2,mBorderInsideColor);
	            // 画外圆
	            drawCircleBorder(canvas, radius + mBorderThickness + mBorderThickness / 2, mBorderOutsideColor);
	        } else if (mBorderInsideColor != defaultColor && mBorderOutsideColor == defaultColor) {// 定义画一个边框
	            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;
	            drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderInsideColor);
	        } else if (mBorderInsideColor == defaultColor && mBorderOutsideColor != defaultColor) {// 定义画一个边框
	            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2 - mBorderThickness;
	            drawCircleBorder(canvas, radius + mBorderThickness / 2, mBorderOutsideColor);
	        } else {// 没有边框
	            radius = (defaultWidth < defaultHeight ? defaultWidth : defaultHeight) / 2;
	        }
	        Bitmap roundBitmap = getCroppedRoundBitmap(bitmap, radius);
	        canvas.drawBitmap(roundBitmap, defaultWidth / 2 - radius, defaultHeight / 2 - radius, null);
	    }

	    /**
	     * 获取裁剪后的圆形图片
	     * @param radius半径
	     */
	    public Bitmap getCroppedRoundBitmap(Bitmap bmp, int radius) {
	        Bitmap scaledSrcBmp;
	        int diameter = radius * 2;
	        // 为了防止宽高不相等，造成圆形图片变形，因此截取长方形中处于中间位置最大的正方形图片
	        int bmpWidth = bmp.getWidth();
	        int bmpHeight = bmp.getHeight();
	        int squareWidth = 0, squareHeight = 0;
	        int x = 0, y = 0;
	        Bitmap squareBitmap;
	        if (bmpHeight > bmpWidth) {// 高大于宽
	            squareWidth = squareHeight = bmpWidth;
	            x = 0;
	            y = (bmpHeight - bmpWidth) / 2;
	            // 截取正方形图片
	            squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth, squareHeight);
	        } else if (bmpHeight < bmpWidth) {// 宽大于高
	            squareWidth = squareHeight = bmpHeight;
	            x = (bmpWidth - bmpHeight) / 2;
	            y = 0;
	            squareBitmap = Bitmap.createBitmap(bmp, x, y, squareWidth,squareHeight);
	        } else {
	            squareBitmap = bmp;
	        }
	        if (squareBitmap.getWidth() != diameter || squareBitmap.getHeight() != diameter) {
	            scaledSrcBmp = Bitmap.createScaledBitmap(squareBitmap, diameter,diameter, true);
	        } else {
	            scaledSrcBmp = squareBitmap;
	        }
	        Bitmap output = Bitmap.createBitmap(scaledSrcBmp.getWidth(),
	                scaledSrcBmp.getHeight(),
	                Config.ARGB_8888);
	        Canvas canvas = new Canvas(output);

	        Paint paint = new Paint();
	        Rect rect = new Rect(0, 0, scaledSrcBmp.getWidth(),scaledSrcBmp.getHeight());

	        paint.setAntiAlias(true);
	        paint.setFilterBitmap(true);
	        paint.setDither(true);
	        canvas.drawARGB(0, 0, 0, 0);
	        canvas.drawCircle(scaledSrcBmp.getWidth() / 2,
	                scaledSrcBmp.getHeight() / 2,
	                scaledSrcBmp.getWidth() / 2,
	                paint);
	        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
	        canvas.drawBitmap(scaledSrcBmp, rect, rect, paint);
	        bmp = null;
	        squareBitmap = null;
	        scaledSrcBmp = null;
	        return output;
	    }

	    /**
	     * 边缘画圆
	     */
	    private void drawCircleBorder(Canvas canvas, int radius, int color) {
	        Paint paint = new Paint();
	        /* 去锯齿 */
	        paint.setAntiAlias(true);
	        paint.setFilterBitmap(true);
	        paint.setDither(true);
	        paint.setColor(color);
	        /* 设置paint的　style　为STROKE：空心 */
	        paint.setStyle(Paint.Style.STROKE);
	        /* 设置paint的外框宽度 */
	        paint.setStrokeWidth(mBorderThickness);
	        canvas.drawCircle(defaultWidth / 2, defaultHeight / 2, radius, paint);
	    }
}
